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Design of heavy vehicle chassis
Herman, Tomáš ; Hejtmánek, Petr (referee) ; Fojtášek, Jan (advisor)
The topic of this bachelor thesis is „Design of heavy vehicle chassis". The following chapters describe individual parts of heavy vehicle chassis (frames, suspension, brakes). There are also mentioned advantages and disadvantages, utilization and function of individual components.
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Influence of vehicle geometry on tire durability
Fuchsová, Kateřina ; Langer, Aleš (referee) ; Bilík, Martin (advisor)
This document focuses on the influence of vehicle geometry setting on the tire tread wear. A series of tests using trucks with varied geometry settings has been carried out. The data of tire tread wear was collected during a five month period. An analysis was then conducted and a proposition of adjusting the methodology for further usage has been made.
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Influence of heavy vehicle load to the vehicle deceleration
Jirásková, Iveta ; Tylšar, Vladimír (referee) ; Bradáč, Albert (advisor)
The diploma thesis deals with the issue of braking trucks at different loads. The theoretical part defines the basic construction of trucks, truck brakes, the braking process and the factors that affect braking, braking deceleration, and legislative requirements for truck brakes. The practical part describes the course of experimental measurements, the use of the technique, the place of measurement, atmospheric conditions and used trucks. At the end of the work, based on experimental measurements, the obtained values of braking deceleration of trucks are evaluated.
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Construction design of the biological specimen vehicle
Otáhalík, Pavel ; Ramík, Pavel (referee) ; Štětina, Josef (advisor)
This diploma thesis deals with the design of a vehicle for biological sampling. The beginning of the thesis is devoted to explaining the reasons for the construction of this vehicle and examples of other special vehicles used by paramedics or rescuers are given. The next part of the thesis deals with the design. First, the vehicle that will serve as the platform for the body is selected and then the design of the body is described. Next, the interior of the sampling vehicle is designed to contain all the equipment needed for the efficient work of the doctors performing tissue sampling. Finally, the strength of the auxiliary frame of the vehicle, which serves as the basis for the superstructure, is checked. In conclusion, the design is evaluated to see if all the requirements given in the brief have been achieved and consider what needs to be addressed further to build the biological sampling vehicle.
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Adaptive Damping for Trucks
Neuman, Ondřej ; Hejtmánek, Petr (referee) ; Blaťák, Ondřej (advisor)
This diploma thesis is concerned with designing a computational model of a commercial vehicle. In addition to that, a control algorithm for adaptive damping is presented. These two parts are connected into a closed loop and together they create an adaptive damping system. The primary task of the algorithm is to react on a vehicle load change. Vehicle model has the opportunity to create different driving scenarios, which are used to verify algorithm functionality. With the help of computational model and optimalization process, suitable damping characteristics are derived. An evaluation of vehicle comfort and driving safety is also presented.
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Springing and Damping of Truck Cabin
Kroupa, Ondřej ; Vančura, Jan (referee) ; Blaťák, Ondřej (advisor)
This Diploma Theses, which can be included in the field of vehicle dynamics, explores the effect of suspension and damping of truck cabs for the safe ride and comfort. As the driver spends many hours in their vehicle, comfort is the most essential criterion. That is why we seek possible improvements which are offered by the sprung cab. The research part firstly analyses the individual elements of suspension and damping. The following chapter is devoted to the systems which are used nowadays in the construction of cabin suspension. Next there is the introduction to the theoretical production of a simplified computational model as well as the presentation of the possible evaluation of the achieved results. The following practical part deals with the actual shaping of the computational model in the Adams View software, which is based on a real vehicle, and was lent at the faculty. The model is then verified and compared with the existing state and the cab mounting concepts are tested on it. The effects of cab parameters on driving comfort and safe riding were tested on it as well. The last part focuses on the forming of the special Dakar computational model, on which optimization was performed according to the findings discussed in the previous chapter. Also, the appropriate configurations to the real-life testing were designed.
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Influence of vehicle geometry on tire durability
Fuchsová, Kateřina ; Langer, Aleš (referee) ; Bilík, Martin (advisor)
This document focuses on the influence of vehicle geometry setting on the tire tread wear. A series of tests using trucks with varied geometry settings has been carried out. The data of tire tread wear was collected during a five month period. An analysis was then conducted and a proposition of adjusting the methodology for further usage has been made.
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Influence of heavy vehicle load to the vehicle deceleration
Jirásková, Iveta ; Tylšar, Vladimír (referee) ; Bradáč, Albert (advisor)
The diploma thesis deals with the issue of braking trucks at different loads. The theoretical part defines the basic construction of trucks, truck brakes, the braking process and the factors that affect braking, braking deceleration, and legislative requirements for truck brakes. The practical part describes the course of experimental measurements, the use of the technique, the place of measurement, atmospheric conditions and used trucks. At the end of the work, based on experimental measurements, the obtained values of braking deceleration of trucks are evaluated.
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Torque Vectoring Differentials for Heavy Commercial Vehicles
Fojtášek, Jan ; Magdolen,, Ľuboš (referee) ; Tůma, Jiří (referee) ; Porteš, Petr (advisor)
This work deals with the assessment of the yaw moment control via active differential effects to the heavy commercial vehicle dynamics. Summarized are the findings about design of active differential, control algorithms and theoretical assumptions about overall effects to the vehicle dynamics. According to the described theory the own concept of the active differential for experimental heavy commercial vehicle is proposed. The main part of the work is focused on the effects of the active differential on vehicle manoeuvrability, controllability, stability and limits analysis. For this purpose, multibody dynamic model of the complete vehicle with standard open differential is assembled and results of the selected manoeuvre simulations validated by measurements of the real vehicle characteristics. The validated vehicle model is then extended by the model of the active differential with control algorithm. According to the simulations results the theoretical presumptions are confirmed and the effects of the active differential on vehicle dynamics in steady and transition states are evaluated. Based on the described findings the overall improvement of the vehicle dynamics by this technology, feasibility of the proposed concept and main advantages and disadvantages are evaluated.
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